Download SpaceSniffer for Windows PC v2.2.0.27 for Windows PC

SpaceSniffer shows where your disk space went as an interactive treemap you can zoom, filter and clean from — a portable freeware analyser that runs...

Features

• The zoomable treemap makes the largest folders and files obvious at a glance, and you can keep navigating and zooming while the scan is still running.
• Completely portable: the official ZIP holds a single executable, it never touches the registry beyond a plain XML config file, and it can run from a USB stick.
• The filter field supports combined name, size and age criteria, so you can isolate exactly the old, large files you want to review for deletion.
• Four-colour file tagging lets you mark items during an investigation and then filter on the tags before deciding what to move or remove.
• Scans can be exported as customisable text reports, and the analyser even accounts for NTFS Alternate Data Streams that simpler tools miss.

Considerations

• The current 2.2.0.27 release is 64-bit only, so 32-bit Windows installations must use one of the older builds from the same download page.
• A very full drive produces a dense, initially overwhelming map; the tool only becomes quick once you learn its zoom and filter workflow.
• There is no built-in cleaner — SpaceSniffer only locates space hogs, and deleting or moving files is done through Windows Explorer yourself.

SpaceSniffer answers one question faster than almost anything else: where did all the disk space go? It draws the drive as a treemap — every folder and file is a rectangle sized by how much space it uses — so a forgotten video folder or a 40 GB game install is literally the biggest thing on the screen. The treemap is not a gimmick: a full drive renders as a single picture, and clicking any block zooms into it without rescanning, while you navigate back and forth like a web browser. You can keep exploring while the scan is still running: the view reacts live to file-system changes, with blocks blinking as files change on disk. That liveness separates it from list-based analysers that freeze until the scan finishes, and the freeware from Italy's Uderzo Software has been refined since 2009.

The filter syntax is the power feature. Type a combination of extension, size and age criteria and the map reduces to exactly the files you suspected were wasting space — old, large downloads, for example, rather than everything on the drive. While investigating, files can be tagged in four colours for follow-up, and you can then filter on the tags before deciding what to move or remove — a simple investigation workflow: find, mark, review, act. Completed scans can be exported as customisable text reports, useful when you are cleaning a PC for someone else and want a record of what was found. The analysis even accounts for NTFS Alternate Data Streams, the hidden data streams that can be attached to ordinary files and that simpler tools miss entirely.

There is no installer: the official download is a ZIP containing a single executable plus manuals, settings are written only to a plain XML configuration file, and it can run from a USB stick — the current release, 2.2.0.27, is 64-bit only, so 32-bit Windows installations must use an older build from the same download page. SpaceSniffer is freeware for all uses, supported by donations to its developer, Umberto Uderzo, and it is worth downloading only from uderzo.it, since a tool this popular attracts repackaged copies elsewhere. The honest limits: a very full drive produces a dense, initially overwhelming map, and the tool only becomes quick once you learn its zoom and filter workflow. It also has no built-in cleaner — it locates space hogs, and deleting or moving files is done by you, through the normal Windows right-click menu and Explorer, which keeps the tool safe but adds a step. Requirements are tiny: 512 MB of RAM and 10 MB of space.

Download spacesniffer_2_2_0_27_x64.zip from Uderzo Software's own download page using the button above and save it to your Downloads folder.

Right-click the ZIP and choose Extract All; the folder contains SpaceSniffer.exe plus the quick-start guide, user manual and release notes — there is no installer to run.

Double-click SpaceSniffer.exe, pick a drive or folder to scan, and click the biggest blocks in the treemap to zoom in and find what is eating your disk space.

Where can I download SpaceSniffer?

Download SpaceSniffer from Uderzo Software's official site, uderzo.it. Version 2.2.0.27 is distributed as a small ZIP for 64-bit Windows; there is no installer, so extract the ZIP and run SpaceSniffer.exe.

Is SpaceSniffer free?

Yes. SpaceSniffer is freeware for all uses, with donations welcomed by its developer, Umberto Uderzo. It is closed-source and fully portable, storing its settings in a plain XML file rather than the Windows registry.

Is SpaceSniffer trustworthy?

SpaceSniffer is a long-running utility from Uderzo Software and is distributed only as a ready-to-run executable from the official site. Download it from uderzo.it rather than a repack, and remember that it only analyses and displays storage; deletion decisions stay with you through the Windows context menu.

What is the best disk space analyzer for Windows 11?

SpaceSniffer is one of the best choices when you want to see the answer visually. It draws the drive as a treemap in which each file and folder is a rectangle sized by disk use, so a forgotten video folder or a 40 GB game install is immediately obvious, and you can click blocks to zoom in.